Cardiovascular System: Blood Vessels and Circulation Chapter 20 Quiz
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Questions and Answers

What is the function of vasa vasorum in blood vessels?

  • Regulate blood pressure in arterioles
  • Control the diameter of capillaries
  • Prevent backflow of blood in veins
  • Deliver nutrients and remove waste from the cells of large vessels (correct)

    • Which layer of a blood vessel is primarily composed of smooth muscle supported by connective tissue?

  • Tunica media (correct)
  • Internal elastic membrane
  • Tunica externa
  • Tunica intima

    • What is the primary function of metarterioles in the circulatory system?

  • Connect arteries to veins directly
  • Contain valves to prevent backflow of blood
  • Regulate blood flow into capillary beds (correct)
  • Transport oxygenated blood to tissues

    • What is a characteristic of sinusoid capillaries?

    <p>Permeable to larger molecules</p> Signup and view all the answers

    How do arterioles contribute to regulating blood pressure?

    <p>By slowing down blood flow and decreasing BP</p> Signup and view all the answers

    What mechanism leads to vasoconstriction in blood vessels?

    <p>Decreases blood flow and increases BP</p> Signup and view all the answers

    Why do veins have valves in the circulatory system?

    <p>To slow down the flow of blood toward the heart</p> Signup and view all the answers

    'Pulse pressure' is defined as:

    <p>The difference between systolic and diastolic pressure</p> Signup and view all the answers

    'Hypovolemia' refers to a condition characterized by:

    <p>Reduced total blood volume</p> Signup and view all the answers

    What is the purpose of a precapillary sphincter in the circulatory system?

    <p>To regulate blood flow into capillary beds</p> Signup and view all the answers

    What is the main function of the skeletal muscle pump in the venous system?

    <p>To force blood back toward the heart</p> Signup and view all the answers

    Which process describes how large plasma proteins can pass through sinusoids in the capillary exchange program?

    <p>Filtration</p> Signup and view all the answers

    What is the role of the lymphatic system in the vascular system?

    <p>Picks up extra fluid and dumps it into subclavian vein</p> Signup and view all the answers

    Which organ shows the highest increase in blood flow from resting to maximal exercise?

    <p>Skeletal Muscle</p> Signup and view all the answers

    What is the main function of chemoreceptors in the neural regulation of the vascular system?

    <p>Monitor oxygen, carbon dioxide, and pH levels</p> Signup and view all the answers

    What is the primary function of Antidiuretic Hormone (ADH) in the endocrine regulation of the vascular system?

    <p>Target kidneys to reabsorb water and constrict peripheral vessels</p> Signup and view all the answers

    What is the mechanism activated due to a decrease in blood flow, eventually leading to Angiotensin 2 release?

    <p>Renin-Angiotensin-Aldosterone Mechanism</p> Signup and view all the answers

    How does exercise affect LDL cholesterol levels according to the text?

    <p>Decreases LDL cholesterol levels</p> Signup and view all the answers

    What is a potential consequence of hypertension according to the text?

    <p>Heart attack</p> Signup and view all the answers

    What is a characteristic of circulatory shock described in the text?

    <p>Inability to deliver adequate O2 for normal cellular metabolism</p> Signup and view all the answers

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